High CPU on 3750

atosorigin · ‎10-31-2007

Hello,

i've got 3750 that have always high cpu (more than 60%). i 've upgrade it (i've twho 3750 in hsrp backup), without resolve problem cpu. the show process doesn't say me what process uses more cpu (some processes have only 1 or 2 % utilisation, and 3750 has 60% utilisation....).

#sh process cpu sort

CPU utilization for five seconds: 50%/39%; one minute: 51%; five minutes: 50%

PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process

65 177857 18348978 9 1.11% 1.63% 1.42% 0 HLFM address lea

176 5570269 38169653 145 0.95% 1.49% 1.42% 0 IP Input

4 714151 73308 9741 0.95% 0.15% 0.12% 0 Check heaps

118 4328238 450665 9604 0.79% 0.47% 0.40% 0 HL3U bkgrd proce

250 1195971 12184575 98 0.63% 0.45% 0.41% 0 HSRP (Standby)

52 1042468 247284 4215 0.31% 0.24% 0.22% 0 Adjust Regions

285 242 103 2349 0.31% 0.21% 0.06% 1 Virtual Exec

179 1158602 10922151 106 0.31% 0.21% 0.18% 0 Spanning Tree

9 671900 2671744 251 0.31% 0.18% 0.16% 0 ARP Input

117 397752 14719703 27 0.15% 0.04% 0.11% 0 Hulc LED Process

11 0 2 0 0.00% 0.00% 0.00% 0 AAA high-capacit

Regards,

Damien

glen.grant · ‎10-31-2007

Apparently you have a fair amount of traffic that is being punted to the cpu instead of being hardware switched , this could be anything from a large number of acl's to other things . Maybe this page might help.Also you can a do search for 3750 high cpu on cisco.com for other docs.

http://cisco.com/en/US/products/hw/switches/ps5023/products_tech_note09186a00807213f5.shtml

atosorigin · ‎10-31-2007

Thanks for your response.

i've seen this page before, but haven't find one solution for my problem.

In fact, the cpu loads is incrused continously step by step during one or two hours from 20 % to 60 or 80%.

We have no ACL on this router.

We have find one solution to stop the progress of cpu in adding one static route and remove it immediately...